GB683995A - Improvements in circuits for testing outlets in automatic selector switches - Google Patents

Improvements in circuits for testing outlets in automatic selector switches

Info

Publication number
GB683995A
GB683995A GB31486/50A GB3148650A GB683995A GB 683995 A GB683995 A GB 683995A GB 31486/50 A GB31486/50 A GB 31486/50A GB 3148650 A GB3148650 A GB 3148650A GB 683995 A GB683995 A GB 683995A
Authority
GB
United Kingdom
Prior art keywords
busy
potential
relay
volts
outlets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB31486/50A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB683995A publication Critical patent/GB683995A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
GB31486/50A 1949-12-31 1950-12-28 Improvements in circuits for testing outlets in automatic selector switches Expired GB683995A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL287410X 1949-12-31

Publications (1)

Publication Number Publication Date
GB683995A true GB683995A (en) 1952-12-10

Family

ID=19782593

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31486/50A Expired GB683995A (en) 1949-12-31 1950-12-28 Improvements in circuits for testing outlets in automatic selector switches

Country Status (7)

Country Link
US (1) US2709203A (de)
BE (1) BE500347A (de)
CH (1) CH287410A (de)
DE (1) DE844173C (de)
FR (1) FR1034721A (de)
GB (1) GB683995A (de)
NL (1) NL150786B (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1034629A (fr) * 1950-11-09 1953-07-28 Materiel Telephonique Perfectionnements aux systèmes de signalisation utilisés pour caractériser les lignes d'abonnés à un réseau téléphonique
NL127302C (de) * 1958-04-28
BE622707A (de) * 1961-09-22
DE1190998B (de) * 1962-06-08 1965-04-15 Standard Elektrik Lorenz Ag Schaltungsanordnung zur Auswertung des Buendelzustandes in Fernmelde-, insbesondere Fernsprechanlagen
NL296098A (de) * 1963-04-11
US3278688A (en) * 1963-06-11 1966-10-11 Stromberg Carlson Corp Telephone circuit having means for preventing double connections
US3316356A (en) * 1966-05-13 1967-04-25 Bell Telephone Canada Selector circuit

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE22861E (en) * 1947-04-08 Electric selection controlling
GB439323A (en) * 1934-09-24 1935-12-04 Siemens Brothers & Co Ltd Improvements relating to automatic telephone and like selective systems
US2336861A (en) * 1942-09-19 1943-12-14 Bell Telephone Labor Inc Selector switch circuit
GB571520A (en) * 1944-01-12 1945-08-28 Siemens Brothers & Co Ltd Improvements relating to electric selective signalling systems
GB578984A (en) * 1945-01-01 1946-07-18 Siemens Brothers & Co Ltd Improvements relating to automatic telephone systems
US2576097A (en) * 1945-07-23 1951-11-27 Int Standard Electric Corp Automatic telephone selective switching system

Also Published As

Publication number Publication date
FR1034721A (fr) 1953-07-30
NL150786B (nl)
US2709203A (en) 1955-05-24
DE844173C (de) 1952-07-17
BE500347A (de) 1900-01-01
CH287410A (de) 1952-11-30

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